Rhododendron yakushuminum 'Grumpy'

Rhododendron yakushuminum Nakai Ericaceae. Cultivar 'Grumpy' Distribution: Yaku-shima an island off the south coast of Japan. Discovered early 1900s, introduced to UK in 1934. No medicinal value but the leaves of rhododendrons are very poisonous due to a toxic resin called grayanotoxin. This is also present in the nectar sucking it from the flowers or eating two leaves, causes serious illness - st…